Build complex rules, operate them with Pydantic, and execute them in Python

Installation

pip install pydantic-logic

Examples

True expression

from pydantic_logic import Logic, LogicExpression, Operator

data = {
    "Phone number": "123123123",
    "some_value": True,
    "some_other_value": 1,
}

logic = Logic(
    expressions=[
        LogicExpression.b("Phone number", Operator.NE, "adasdasdasd"),
        LogicExpression.b("some_value", Operator.EQ, True),
        LogicExpression.b("some_other_value", Operator.GT, 0),
    ]
)
assert logic.evaluate(data)

False expression

from pydantic_logic import Logic, LogicExpression, Operator

data = {
    "Phone number": "123123123",
    "some_value": True,
    "some_other_value": 1,
}

logic = Logic(
    expressions=[
        LogicExpression.b("Phone number", Operator.EQ, "123123123"),
        LogicExpression.b("some_value", Operator.NE, False),
        LogicExpression.b("some_other_value", Operator.LT, 1),
    ]
)
assert not logic.evaluate(data)

Empty expression with default result

Suitable if the expressions are set by the end users, not the code

from pydantic_logic import Logic

data = {
    "Phone number": "123123123",
    "some_value": True,
    "some_other_value": 1,
}

logic = Logic(
    expressions=[]
)
assert logic.evaluate(data, default_if_empty=True)

Get wrong expressions

from pydantic_logic import Logic, LogicExpression, Operator

data = {
    "Phone number": "123123123",
    "some_value": True,
    "some_other_value": 1,
}

logic = Logic(
    expressions=[
        LogicExpression.b("Phone number", Operator.EQ, "123123123"),
        LogicExpression.b("some_value", Operator.NE, False),
        LogicExpression.b("some_other_value", Operator.LT, 1),
    ]
)
logic.get_wrong_expressions(data)  # second and third